Fastener



May 3, 1938. VP CHA Q 2,116,365

FASTENEB Filed Aug. 17, 1936 I Fl Patented May 3, 1938 UNITED STATESFASTENER Friedrich Schafer, St. Gallen, Switzerland, as-

signor of one-half to Waldes A Spol (partners Jindrich Waldes, ZikmundWaldes, and Vojtech Puc), Prague, Czechoslovakia Application August 17,1936, Serial No. 96,433

In Switzerland October 1, 1935 1 Claim.

This application has been filed in Switzerland on October 1, 1935.

The present invention relates to fasteners, made of springy wire in theform of a bendable clamp having two clamping limbs connected at one end,hereinafter referred to as the apex of the clamp, by a cross member. Theinvention particularly relates to fasteners of the above kind in whichthe two limbs cross each other. Such fasteners are mainly used forclamping or fastening paper sheets and thin textile articles.

The object of the invention is to provide a fastener of the above typewhich will very effecr tively clamp the article and can be easilyinserted or applied without any risk of injury to the article.

An important feature of the invention is the fact that one of the limbsof the clamp is bent near the apex of the clamp so that the bent portionis not in the plane in which the limbs of the clamp cross each otherwhilst the other limb lies in the plane of the clamp. Owing to thisconstruction the limbs of the clamp will upon application of the clampto the article to be clamped, say a bundle of sheets of paper or textilelayers, slide parallel to the, main plane of the article,

without any risk of the article becoming injured or creased, or movedapart. Moreover, the several sheets or layers of the article will beuniformly and permanently clamped so that any accidental sliding off ofthe clamp cannot take place.

It is preferred to make the bent limb of the clamp shorter than thestraight limb and to arrange the point of crossing of the two limbs sothat its distance from the apex of the clamp is greater than thedistance of the two upper ends of the limbs.

Upon application of the clamp, the sheets or layers'of the article arevery firmly gripped even if their edges or ends are not exactly inregister. It is not necessary on applying the clamp to move the twolimbs of the clamp apart. The clamp may, for instance be applied byplacing first the upper connecting member of the limbs at an angle tothe plane of the article so that upon sliding the clamp upon thearticle, the limbs of the clamp automatically move into planes parallelto the main plane of the article.

The improved construction therefore has also the important advantage offacilitating application or insertion of the clamp.

The accompanying drawing illustrates two constructions embodying thefeatures of the invention.

The first construction is shown in Figs. 1 and 4,

Fig. 1 being a front View of the improved clamp,

Fig. 2 a side elevation,

Fig. 3 a top view and Fig. 4 a view similar to Fig. 1 showing the mannerin which the improved clamp may be applied to a bundle of paper sheetsor textile layers.

Referring to the drawing, a designates the short and b indicates thelong limb of a clamp made of springy wire. The straight memberconnecting the tops of the limbs is designated by the letter 0. The limba. has in the vicinity of the member 0 a bent portiond which projectsfrom the main plane of the clamp. The limbs a and b are formed at theirends with rounded heads 1 and g respectively. Due to the provision ofthe bent portion d of the limb or the clamp will exert a very strong,uniform and permanent clamping action. Making the limbs of differentlengths facilitates the application of the clamp to a bundle of sheetsor textile layers indicated by chain dotted lines in Fig. 4, even if thetop edges of the sheets or layers do not register. It will be seen thatin that case the clamp is so applied that the shorter limb engages thelonger and the longer limb the shorter sheets of the bundle. Making thepoint at which the limbs a and I) cross each other at a distance fromthe apex of the clamp greater than the length of the transverseconnecting member c, facilitates applica over, on applying the clamp tothe sheets of paper or material to be held together, the limbs press orforce themselves into the sheets, the flattened portions 0/ and btending to lie flat on the face of the sheets whilst the connectingstrip 0 tends to take up a position parallel to the plane of the paper.

I claim:

A clamp made of springy wire, more particularly for fastening papersheets and textile articles, comprising in combination: two limbs madeof springy wire connected at the top by an apex member, one of the limbshaving at the point of connection with the apex member a bent portionprojecting from the main plane of the clamp and the other'limb extendingstraight in the said plane, whereby the clamp, on being applied to thepaper, will automatically swing into the plane thereof, the two limbscrossing each other and being formed at the crossing position withflattened portions to allow of as little as possible spreading of thelimbs, said portions being adapted on the application of the clamp tothe sheets to press into said sheets.

FRIEDRICH semis-ER.

